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 <pre>public abstract class <span class="typeNameLabel">InferTypes</span>
 extends <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang" class="externalLink">Object</a></pre>
 <div class="block">Strategies for inferring operand types.</div>
 <dl>
 <dt><span class="seeLabel">See Also:</span></dt>
 <dd><a href="SqlOperandTypeInference.html" title="interface in org.apache.calcite.sql.type"><code>SqlOperandTypeInference</code></a>,
 <a href="ReturnTypes.html" title="class in org.apache.calcite.sql.type"><code>ReturnTypes</code></a></dd>
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 <td class="colFirst"><code>static <a href="SqlOperandTypeInference.html" title="interface in org.apache.calcite.sql.type">SqlOperandTypeInference</a></code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#ANY_NULLABLE">ANY_NULLABLE</a></span></code></th>
 <td class="colLast">
 <div class="block">Operand type-inference strategy where an unknown operand type is assumed
  to be nullable ANY.</div>
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 </tr>
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 <td class="colFirst"><code>static <a href="SqlOperandTypeInference.html" title="interface in org.apache.calcite.sql.type">SqlOperandTypeInference</a></code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#BOOLEAN">BOOLEAN</a></span></code></th>
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 <div class="block">Operand type-inference strategy where an unknown operand type is assumed
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 <td class="colFirst"><code>static <a href="SqlOperandTypeInference.html" title="interface in org.apache.calcite.sql.type">SqlOperandTypeInference</a></code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#FIRST_KNOWN">FIRST_KNOWN</a></span></code></th>
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 <div class="block">Operand type-inference strategy where an unknown operand type is derived
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 <td class="colFirst"><code>static <a href="SqlOperandTypeInference.html" title="interface in org.apache.calcite.sql.type">SqlOperandTypeInference</a></code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#RETURN_TYPE">RETURN_TYPE</a></span></code></th>
 <td class="colLast">
 <div class="block">Operand type-inference strategy where an unknown operand type is derived
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 </td>
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 <tr class="altColor">
 <td class="colFirst"><code>static <a href="SqlOperandTypeInference.html" title="interface in org.apache.calcite.sql.type">SqlOperandTypeInference</a></code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#VARCHAR_1024">VARCHAR_1024</a></span></code></th>
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 <td class="colFirst"><code>static <a href="SqlOperandTypeInference.html" title="interface in org.apache.calcite.sql.type">SqlOperandTypeInference</a></code></td>
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 <div class="block">Returns an <a href="SqlOperandTypeInference.html" title="interface in org.apache.calcite.sql.type"><code>SqlOperandTypeInference</code></a> that returns a given list of
  types.</div>
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 <div class="block">Operand type-inference strategy where an unknown operand type is assumed
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	<h1 title="Class InferTypes" class="title">Class InferTypes</h1>
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	<pre>public abstract class <span class="typeNameLabel">InferTypes</span>
	extends <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang" class="externalLink">Object</a></pre>
	<div class="block">Strategies for inferring operand types.</div>
	<dl>
	<dt><span class="seeLabel">See Also:</span></dt>
	<dd><a href="SqlOperandTypeInference.html" title="interface in org.apache.calcite.sql.type"><code>SqlOperandTypeInference</code></a>,
	<a href="ReturnTypes.html" title="class in org.apache.calcite.sql.type"><code>ReturnTypes</code></a></dd>
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	<td class="colFirst"><code>static <a href="SqlOperandTypeInference.html" title="interface in org.apache.calcite.sql.type">SqlOperandTypeInference</a></code></td>
	<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#ANY_NULLABLE">ANY_NULLABLE</a></span></code></th>
	<td class="colLast">
	<div class="block">Operand type-inference strategy where an unknown operand type is assumed
	to be nullable ANY.</div>
	</td>
	</tr>
	<tr class="rowColor">
	<td class="colFirst"><code>static <a href="SqlOperandTypeInference.html" title="interface in org.apache.calcite.sql.type">SqlOperandTypeInference</a></code></td>
	<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#BOOLEAN">BOOLEAN</a></span></code></th>
	<td class="colLast">
	<div class="block">Operand type-inference strategy where an unknown operand type is assumed
	to be boolean.</div>
	</td>
	</tr>
	<tr class="altColor">
	<td class="colFirst"><code>static <a href="SqlOperandTypeInference.html" title="interface in org.apache.calcite.sql.type">SqlOperandTypeInference</a></code></td>
	<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#FIRST_KNOWN">FIRST_KNOWN</a></span></code></th>
	<td class="colLast">
	<div class="block">Operand type-inference strategy where an unknown operand type is derived
	from the first operand with a known type.</div>
	</td>
	</tr>
	<tr class="rowColor">
	<td class="colFirst"><code>static <a href="SqlOperandTypeInference.html" title="interface in org.apache.calcite.sql.type">SqlOperandTypeInference</a></code></td>
	<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#RETURN_TYPE">RETURN_TYPE</a></span></code></th>
	<td class="colLast">
	<div class="block">Operand type-inference strategy where an unknown operand type is derived
	from the call's return type.</div>
	</td>
	</tr>
	<tr class="altColor">
	<td class="colFirst"><code>static <a href="SqlOperandTypeInference.html" title="interface in org.apache.calcite.sql.type">SqlOperandTypeInference</a></code></td>
	<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#VARCHAR_1024">VARCHAR_1024</a></span></code></th>
	<td class="colLast">
	<div class="block">Operand type-inference strategy where an unknown operand type is assumed
	to be VARCHAR(1024).</div>
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	<td class="colFirst"><code>static <a href="SqlOperandTypeInference.html" title="interface in org.apache.calcite.sql.type">SqlOperandTypeInference</a></code></td>
	<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#explicit(java.util.List)">explicit</a></span>(<a href="https://docs.oracle.com/javase/9/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util" class="externalLink">List</a><<a href="../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a>> types)</code></th>
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	<div class="block">Returns an <a href="SqlOperandTypeInference.html" title="interface in org.apache.calcite.sql.type"><code>SqlOperandTypeInference</code></a> that returns a given list of
	types.</div>
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	<h3><a id="FIRST_KNOWN">FIRST_KNOWN</a></h3>
	<div class="memberSignature"><span class="modifiers">public static final</span> <span class="returnType"><a href="SqlOperandTypeInference.html" title="interface in org.apache.calcite.sql.type">SqlOperandTypeInference</a></span> <span class="memberName">FIRST_KNOWN</span></div>
	<div class="block">Operand type-inference strategy where an unknown operand type is derived
	from the first operand with a known type.</div>
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	<h3><a id="RETURN_TYPE">RETURN_TYPE</a></h3>
	<div class="memberSignature"><span class="modifiers">public static final</span> <span class="returnType"><a href="SqlOperandTypeInference.html" title="interface in org.apache.calcite.sql.type">SqlOperandTypeInference</a></span> <span class="memberName">RETURN_TYPE</span></div>
	<div class="block">Operand type-inference strategy where an unknown operand type is derived
	from the call's return type. If the return type is a record, it must have
	the same number of fields as the number of operands.</div>
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	<h3><a id="BOOLEAN">BOOLEAN</a></h3>
	<div class="memberSignature"><span class="modifiers">public static final</span> <span class="returnType"><a href="SqlOperandTypeInference.html" title="interface in org.apache.calcite.sql.type">SqlOperandTypeInference</a></span> <span class="memberName">BOOLEAN</span></div>
	<div class="block">Operand type-inference strategy where an unknown operand type is assumed
	to be boolean.</div>
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	<h3><a id="VARCHAR_1024">VARCHAR_1024</a></h3>
	<div class="memberSignature"><span class="modifiers">public static final</span> <span class="returnType"><a href="SqlOperandTypeInference.html" title="interface in org.apache.calcite.sql.type">SqlOperandTypeInference</a></span> <span class="memberName">VARCHAR_1024</span></div>
	<div class="block">Operand type-inference strategy where an unknown operand type is assumed
	to be VARCHAR(1024). This is not something which should be used in most
	cases (especially since the precision is arbitrary), but for IS [NOT]
	NULL, we don't really care about the type at all, so it's reasonable to
	use something that every other type can be cast to.</div>
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	<h3><a id="ANY_NULLABLE">ANY_NULLABLE</a></h3>
	<div class="memberSignature"><span class="modifiers">public static final</span> <span class="returnType"><a href="SqlOperandTypeInference.html" title="interface in org.apache.calcite.sql.type">SqlOperandTypeInference</a></span> <span class="memberName">ANY_NULLABLE</span></div>
	<div class="block">Operand type-inference strategy where an unknown operand type is assumed
	to be nullable ANY.</div>
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	<h3><a id="explicit(java.util.List)">explicit</a></h3>
	<div class="memberSignature"><span class="modifiers">public static</span> <span class="returnType"><a href="SqlOperandTypeInference.html" title="interface in org.apache.calcite.sql.type">SqlOperandTypeInference</a></span> <span class="memberName">explicit</span>(<span class="arguments"><a href="https://docs.oracle.com/javase/9/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util" class="externalLink">List</a><<a href="../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a>> types)</span></div>
	<div class="block">Returns an <a href="SqlOperandTypeInference.html" title="interface in org.apache.calcite.sql.type"><code>SqlOperandTypeInference</code></a> that returns a given list of
	types.</div>
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